2 years is too small a period of time. 10 years minimum.
Strictly speaking abducted kids should be separated from missing and within abducted the bed ones and public space ones. The age should be taken into account, as well as the number of national vs foreigners.
I wish I were a statistician.
If you select the 2003/2013 ten years, 3 girls disappeared in Portugal, a Guinean one (6), a Portuguese toddler (2) and the British Madeleine (3/4).
The first little girl (very cute child) was born in Guinea Bissau and adopted there. The Guinean adoptive parents took her to Portugal. About one year later she disappeared. The parents said someone took her in charge and went with her to Spain where she died in a car accident.
The second little girl was abducted by her father, a fisherman from the Açores, divorced, around 9pm. He took a taxi, then got a lift from someone who left him somewhere with the baby. Later he went to the police where he found his ex-wife reporting the abduction. He was alone.
We don't have figures for ten year periods here. We do know that between 250,000 and 300,000 people are reported missing every year in britain and the 65% are under the sage of 18. so taking the lower number of 250,000 x 10 = 25,00000 then - 35% = 8,75000 then - 8,75000 from 25,00000 = 16,25000
but the population of the UK is 6 times that of Portugal, so divide 16, 25000 by 6 = 2,700000
So, have two million, seven hundred thousand people under the age of 18 been reported missing in Portugal in the last ten years?
If the answer is higher than 2,700000 we know that there are more missing children in Portugal than the Uk, taking into account population size.
BTW, I've shown my workings as maths is.....um..... not my strong point, as I demonstrated yesterday. If I've messed up, please point it out.
Also, if anyone can find the figures for under 18's reported missing in Portugal in the last decade, we can answer the OP.